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I am not in complete agreement about replacing the hoses for 134a. Yes, some may leak. but in our older cars you could very likely replace the hoses and still not have a completely leak free system. I have converted 3 cars from R12 to 134a (discalimer: none of them were type 3's). One leaks about 12oz every year, another 12oz every 2 years, the third has not required refilling in 3 years. (got lucky i guess) Most important considerations are: 1) drain the R12 type oil from the compressor as well as possible. The R12 oil and 134 refrigerant are not compatible. 2) replace the receiver/dryer if possible, otherwise heat it under vacuum 3) most of all, have fun. it's alot of work but once it's done you can do the maintenance all yourself! -Todd ----------------------- Additionally... to convert to 134a you need to replace the hoses at least, as they will pass the smaller molecule gas and need to be made of a different rubber for the 134a. There are supposedly some drop in replacements for the R12 though, where you dont need to change or add oil... __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~